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Finding the Fourth Proportional to 308,345.69, 425,520.23 and 172,387.19

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Solution

The fourth proportional to 308,345.69, 425,520.23 and 172,387.19 is: 237,896.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,345.69 : 425,520.23 = 172,387.19 : x
  2. Step 2: Convert to fraction form
    308,345.69/425,520.23 = 172,387.19/x
  3. Step 3: Cross multiply
    308,345.69x = 425,520.23 × 172,387.19
  4. Step 4: Simplify right side
    308,345.69x = 73,354,236,737.85
  5. Step 5: Solve for x
    x = 73,354,236,737.85/308,345.69
  6. Step 6: Final answer
    x = 237,896.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.